80719869 has 4 divisors (see below), whose sum is σ = 107626496. Its totient is φ = 53813244.

The previous prime is 80719867. The next prime is 80719879. The reversal of 80719869 is 96891708.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 80719869 - 2¹ = 80719867 is a prime.

It is a super-2 number, since 2×80719869² = 13031394502754322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80719867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13453309 + ... + 13453314.

It is an arithmetic number, because the mean of its divisors is an integer number (26906624).

Almost surely, 2^80719869 is an apocalyptic number.

It is an amenable number.

80719869 is a deficient number, since it is larger than the sum of its proper divisors (26906627).

80719869 is a wasteful number, since it uses less digits than its factorization.

80719869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26906626.

The product of its (nonzero) digits is 217728, while the sum is 48.

The square root of 80719869 is about 8984.4236876942. The cubic root of 80719869 is about 432.1755063204.

The spelling of 80719869 in words is "eighty million, seven hundred nineteen thousand, eight hundred sixty-nine".